Manufacture of metallic packing



Sept. 13,1927. M M com 1,642,431

MANUFACTURE OF METALLIC PACKING Filed Aug. 4. 1924 V s sheets-sheet 1 l l I Sept. 13, 1927.

M. M. CODY MANUFACTURE oF ME'I'ALLICl PACKING 'Filed Aux. 4. I924 3 Sheets-Sheet 2 0775.629@ WM' yf Se t. 3 192 v l 1,642,431 p 1 7 M. M. coDY MANUFACTURE OF METALLIC PACKING Filed Aug. 4. 1924 3 Sheets-Sheet 3 lig?- Cil Patented Sept. 13, 1927.

UNITED sTATES PATENT OFFICE.

MARTIN M. CCDY, F CHICAGO, ILLINOIS, ASSIGNOE TO CRANE PACKING COMPANY, A

CORPORATION OF ILLINOIS. i

MANUFACTUR-E OF METALLIC PACKING.

Application filed August 4, 1924. Serial No. 730,043.

My inventionrelates to improvements in the manufacture of metallic packing.

The objects of the invention areto provide an improved machine and method forthe manufacture of `a metallic packing ring which may be readily deformed to adapt it to the recess in which it is confined when subjected toendwise pressure. Such apa/3l;- ing ring is disclosed in the Julian N. W'alton Patent No. 1,543,963, granted JuneBO, 1925. Said ring isa continuous metallic packing ring presenting smooth Walls and composed of superimposed layers or convolutions of metal formed of interiitting folds or plaits whereby said ring is particularly adapted as a packing for the ends of condenser tubes.

A furtlierobject of the invention is to provide a machine for manufacturing such a product rapidly and accurately.

In the accompanying drawings one embodiment of the machine is illustrated, together With several forms of the product.

1 is a side elevation ofthe machine.

2 is a. plan view thereof Withsome of the parts removed..`

Fig. 3 is a section on line4 8%3, Fig. 1,

Fig. 4 is a detached plan view of a` knife operating mechanism.

Fig. 5 is a section on line 5--5, Fig r.` 1. C

Fig. 6 is an .elevation of one of the shafts with its associated corrugated rollen'. F ig. 7 is a partial plan vie-W of the stripper and-associated parts. Y i Fig. 8 is an elevation of part of the punch. Fig'. 9 isv a side elevation of one of the rings immediately afterbeing rolled. f

Fig. 10 is an end vien7 thereof. Fig. 11 is a side elevation -of saidfring after a. partial compression endwise. Fig. 12 isan Vend vieiv thereof.

Fig. 13 is a side elevation of the compressed ring. f v

Fig. 14 isan endxview thereof, and n Fig.` 15 is an enlarged sectional view of a finished ring.

16 `is an `enlarged sectional elevation of a modified form of ring. Y

:Fig: 17v is 'a 'vievv `showing the 'methodof i assembling the'metal-foil andfabric.

Thennachine comprises af table l1` `supported "on-.suitable A'legs or: standards 52. 'Power is applied 4to the-driving shaft'cair-V Irying al sprocket 4; Which in turn 'drivesga chain and a second sprocket y6 lon axSllJft 7i. The shaft 3v is the :crank Shaftfotzafpovver press. A bevel gear 8 is mounted on shaft 7 i and drives a second bevel gear 9 Which rotates a vertical sha-ft 10. The shaft 10 carries a gear 11 meshing with a pinion 12. Below gear 1l is a second gear 13 mounted on the said shaft 10, said gear meshing Withgear 14 `vvhich in turn meshes with a` gear 15. rEhese tivo latter gears rotate shafts 16, 17, on which are mounted tvvo feed rollers V18, 19. These rollers are friction fed rollers, having preferably Wooden surfaces. .They feed a strip or strips of flexible packing material to the right, in theposition shown in Fig. 2; said material `being fed from either of two supply spools 2O or 21.` Vliile one spool is being unwound, a full spool may be supplied in place of the one just emptied.

As the metal ribbon leaves spool 20, vit passes along a sheet metal guide 22, being held against the same bya tension roller 23 mounted on an arm 24, Vbeing yieldingly pressed against the saine by a spring (not shown). They ribbon then passes between the feedrollers 18, 19, beingdrawn smooth andflat between the, tension roller and said feed rollers. After passing the feed, rollers, it is guided along to the corrugated Winding rollers 25, 26, which gripthe thin metal foil between them in such Wise as to avoid slipping. The corrugated roller'25 y(see 6) is mounted on a shaft 27 having a pinion 28 thereon which is driven by gear111. The

29 pivoted atBO and yieldingly heldagainst roller by an adjustable `tension spring 131. A guide 32 isprovided Which prevents the foilV fromavinding vabout the corrugated roller 26, therebyinsuring that it Will Wind about the corrugated'roller 25 for the pure pose of forming la ring composed of a number of turns and having a pre-determined length. The length ,is determined bythe tion of adjustment. As the shaft"rotates.,` the knife moves inwardly againststhe'metal foil at different pre-determined intervals, thereby, rcuttingf off exact lengths `of foil as the latter. Alosing: Wees@ into a ringabout corrugated roller 26 is mounted on an arm ico the corrugated' roller In this manner a definite numberI of turns and a definite thickness of a ring are obtained. At the instant that the knife cuts the foil, the feed roller 19 swings away from the companion roller 18. rlhis is effected by movement of the arm 41 which is secured to a shaft 42, the latter having an arm 43 near its upper end carrying a roller 44 which bears against a second cam composed of two plates 45, 46, each having partsof its periphery cut away, as shown in liig.y 5; said plates being rotatably adjustable, onel over the other, to provide a recess of variable length toy control the timing of the movement of the feed roller.

5 After a pre-determined length of foil has been rolled on the corrugated roller 25, it is stripped therefrom bybeing pushed downwardly by a: sleeve 47 (see Fig. 6*). Said sleeve has an annular groove 48v its upper end which is engaged by a forked arm 49 arranged atv the lower end of a` reciprocating rod 50 which is actuated by a pivoted arm 51 at the upper end thereof carrying a roller 52 engaged by a Cain 53 which is mounted on' the horizontal shaft 7. A spring 54 tends to hold rod' 50 and' associated parts in uppermost position against'` the action of the cam'. The sleeve 47 ifs keyed to shaft-27 by means of a suitable key sliding'in the slot 55.

The ring as thus far formed is corrugated', as shown in Figs.l 9 andV 10, showing an elevation and'top plan view, respectively. As it is pressed downwardly from the corrugated roller on which it is formed by collar 47, it is received within a collar of the die 56, of which therevare twelve, mounted on a rotating plate or turret 57. This plate is fed intermittently'by means of a pawl 5S which engages seriesfof circumferential notches 59 in the turret.

The corrugated ring advances to the die in a: step vby step moven'ient to a point beneath the first punch 60, which is of well known construction', consisting of a reciprocating' punch 61 and a: collapsing pilot 62 yieldingly mounted therein. The head y is mounted on a transverse bar 63 which in turn is secured to a vertical reciprocating ram 64 sliding in guide-ways 65 in the frame of the press 66. The pilot enters the corrugated ring and the punch compresses the' ring to about the relative size shownin Figs. 11 and 12. This compression of the ring causes the consecutive layers' to assume .a wavy if-shaped formation. After this operation, the rotation of the turret brings the die beneath the ram 64 where it is acted on by a secondv punch 67. Surrounding this punch is al stripper 68 having a 'groove 69 therein in which lits the end of ja forked lever 70, the latter being'ppivoted, at 71, and held in lowermostV position by a spring 72. As rain 64 moves downwardly 'the' ring is' compressed between the bottom ofthe die and t'he'should'er 73. The stripper 681moves upwardly until it engages the shoulder of the punch after which spring 72 yields. rl-he upward movement of the rain causes the stripper to hold the ring in the die until the punch hasbeen withdrawn, after which the stripper is also elevated. The relative size of the ring is now as shown in Figs. 13 and 14, the ring having been compressed and compacted to' the desiredv dimensions; Continued rotation of the turret brings the finished ringto` the position indicated at 73 at which point al third arm (not shown)- carrying a' plug pushes the ring throughv the platen of the press into ai suitable receptacle. This plugv or kickout, as it is termed, is carried by the'l reciprocating ram 64 and is not shown as it'is'go'f standard construction.- y i In order to' prevent the punch pilot, which performs the first pressing operation from carrying the' partially compressed ring above the collar of the die, al stripper is provided comprising an: arm`14. The latter isV secured to a sliding carriage 75 on which pawl 56 is mounted. As the carriage reciprocates the arm 74 having a notched out part 76I en'- gages the pilot 62 immediately above the collar of the die, thereby holding the ring in the die as the pilot is drawn upwardly. r1`he return' movement of the carriage 75 causes the fixed arm 74 to travel to the right. A modified form of packing is sho-wn in Figs. 16and 1 7 wherein a strip of metalfoil 77 is folded over and a strip of fabric 78 is inserted within the folded metal strip. The fabric strip is preferably narrower than the folded meta-l strip so that the metal projects at each side beyond the fabric. The fabric may be fedv into the folded metal strip in previously cut lengths, the length of fabric corresponding to that necessary fora single ring; ln the nished ring, as Vshown in Fig. 16, all' faces are of metal, the fabric increasing` the resiliency of the finished ring after it has been compressed in dies. i

That I claim is 1. A machine for making'p'acking comprising a roll on which a strip of packing ymaterial is wound to form a ring, means fo-r holding the material against said roll to avoid slip, means for cutting. off a predetermined length of the material supplied to said roll, means for removing the wound ring fromV said roll, and means for compressing said ring. l

2'. A' machine for mak-ing packing coniprising a roll on which the packing is wound to form a corrugatefdring, means for holding theV material againstsaidroll to' avoid s1ip,vineans`forremoving thev wound ring from s 'drn-fand means for compressing said"ringaxially. v Y 3. A'niaelnne for nellaagA packing comprising a roll on which the packing is wound, means for holding the forward end ofthe packing material against said roll to insure winding thereof without slip, means for cutting oif a predetermined length of said material to insure a definite thickness of the packing ring, means for removing` the wound ring from said roll, and means for compressino` said ring in successive stages.

4. A machine for making packing comprising a corrugated roller, means for feeding a strip of soft metal to said roller, means for pressing said strip into the corrugations of said roller and causing it to wind itself thereon, a die, means for removing the packing from said roll and forcing it into'said die, and means for compressing it within the die.

5. Apparatus of t-he class described comprising a roller, means for feeding a strip of packing material to said roller to be wound thereon to form an endless ring, a die, means for moving said ring from said roller into said die, and means for compressing` the ring within the die.

6. Apparatus of the class described, comprising a roller, means for feeding a strip of packing material to said roller to be wound thereon to form an endless ring, a die, means for moving said ring from said roller to said die, means for compressing the ring within the die, and means for ejecting the compressed ring from said die.

7. machine for making packing comprising a corrugated roller, means for feeding a strip of soft metal to said roller, means for pressing said strip into the corrugations of said roller, and causing it to wind itself thereon, means for cutting off a pre-V determined length of said strip to insure a predetermined thickness of the ring, means for removing said ring from said roller longitudinally and forcing it into a die, and means for compressing it within said die.

8,In a device of the class described, a-

pair of corrugated rollers, means for feeding a strip ofsoft metal foil between said rollers, one of said rollers pressing said foil into the corrugations on the other of said rollers and causing said foil to wind itself about said roller, means for stripping the wound ring from said roller, a rotatable turret having a plurality of openings therein arranged so that said rings are fed into the same, and means for compressing said rings in successive stages during the rotation of said turret.

9. In a device of the class described, a storage re'el for a strip of soft flexible packing material, a pair of feed rollers for drawing said material from said supply reel, a pair of corrugated rollers in engagement with each other, said feed rollers feeding said `material to said corrugated rollers, whereby said material is wound about one of said corrugated rollers, a movable arm on which the other of said corrugated rollers is mounted, means for moving the latter roller from engagement with the former corrugated roller, and means for stripping the ring of material from SaidfOrmer roller.

l0. In a device of the class described, a storage reel for a stripof soft'flexible packing material, a pair of feed rollers vfor drawing said material from lsaid supply reel, a pair of corrugated rollers in engagement with each other, said feed rollers feeding said material to said corrugated rollers, whereby said material is wound about one of said corrugated rollers, a movable arm on which the other of said corrugated rollers is mounted, means for moving said other roller out of engagement with said first corrugated roller, means for stripping the ring of material from said first roller, and a knife moving intermittently to cut the material between said feed rollers and said corrugated rollers.

l1. In combination, a pair of co-operating winding rollers, means for feeding a stripV of packing material thereto, means for separating said rollers at intervals, means for stripping a ring of wound material from one of said rollers, a turret having openings therein located to receive said wound material, means for rotating said turret intermittently, andrmeans for compressing said material while held by said turret.

l2. A device of the class described comprising means for winding a ribbon of metal foil into the form of a ring, means for corrugating the successive turns of said foil, and means for compressing said rings longitudinally to cause irregular disposition of the material therein in a direction at right angles to said corrugations.

13. The method of manufacturing metallic packing which consists in winding a'strip of metal tape into `a continuous corrugated ring and thereafter compressing said ring to bend the layers thereof back and forth in directions substantially at right angles to said corrugations.

In testimony whereof, I have subscribed name.

MARTIN ooDY. 

